# Relationship history for MSHA mine 1514930

Current hierarchy: **Harold K  Simpson → S & B Coal Company Inc → S & B #3**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Harold K  Simpson → S & B #3; 1982-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Carolina Coal Company → S & B #3; 1984-10-01 to 1984-12-18; source msha-controller-operator-history
- **controller_controls_mine:** Wright Ernest → S & B #3; 1984-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wright Ernest → Carolina Coal Company; 1984-10-01 to 1984-12-18; source msha-controller-operator-history
- **operator_operates_mine:** Eastland Energy Inc → S & B #3; 1984-12-19 to 1985-09-15; source msha-controller-operator-history
- **controller_controls_mine:** Smith Shorty → S & B #3; 1984-12-19 to 1985-09-15; source msha-controller-operator-history
- **controller_controls_operator:** Smith Shorty → Eastland Energy Inc; 1984-12-19 to 1985-09-15; source msha-controller-operator-history
- **operator_operates_mine:** Mald Energy Inc → S & B #3; 1985-09-16 to 1986-03-16; source msha-controller-operator-history
- **controller_controls_mine:** Dunsmore Loy (Loyd) Et Al → S & B #3; 1985-09-16 to 1986-03-16; source msha-controller-operator-history
- **controller_controls_operator:** Dunsmore Loy (Loyd) Et Al → Mald Energy Inc; 1985-09-16 to 1986-03-16; source msha-controller-operator-history
- **operator_operates_mine:** S & B Coal Company Inc → S & B #3; 1986-03-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harold K  Simpson → S & B Coal Company Inc; 1986-03-17 to current/open; source msha-controller-operator-history